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      1 /*	$NetBSD: param.h,v 1.34 2021/05/31 14:38:56 simonb Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef _POWERPC_PARAM_H
     35 #define	_POWERPC_PARAM_H
     36 
     37 #ifdef _KERNEL_OPT
     38 #include "opt_param.h"
     39 #include "opt_ppcarch.h"
     40 #endif
     41 
     42 /*
     43  * Machine dependent constants for PowerPC
     44  * For userland regardless of port, force MACHINE to be "powerpc"
     45  */
     46 #ifndef _KERNEL
     47 #undef MACHINE
     48 #endif
     49 
     50 #ifdef _LP64
     51 # ifndef MACHINE
     52 #  define	MACHINE		"powerpc64"
     53 # endif
     54 # define	MACHINE_ARCH	"powerpc64"
     55 # define	MID_MACHINE	MID_POWERPC64
     56 #else
     57 # ifndef MACHINE
     58 #  define	MACHINE		"powerpc"
     59 # endif
     60 # define	MACHINE_ARCH	"powerpc"
     61 # define	MID_MACHINE	MID_POWERPC
     62 #endif
     63 
     64 /* PowerPC-specific macro to align a stack pointer (downwards). */
     65 #define	STACK_ALIGNBYTES	(16 - 1)	/* AltiVec */
     66 
     67 #ifdef PPC_IBM4XX
     68 #define	PGSHIFT		14	/* Use 16KB to reduce TLB thrashing */
     69 #define	UPAGES		1
     70 #else
     71 #define	PGSHIFT		12
     72 #define	UPAGES		4
     73 #endif
     74 #define	NBPG		(1 << PGSHIFT)	/* Page size */
     75 #define	PGOFSET		(NBPG - 1)
     76 
     77 #define	BLKDEV_IOSIZE	NBPG
     78 
     79 #define	USPACE		(UPAGES * NBPG)
     80 
     81 #ifndef	MSGBUFSIZE
     82 #define	MSGBUFSIZE	(2*NBPG)	/* default message buffer size */
     83 #endif
     84 
     85 #ifndef KERNBASE
     86 #define	KERNBASE	0x100000
     87 #endif
     88 
     89 /*
     90  * Constants related to network buffer management.
     91  * MCLBYTES must be no larger than NBPG (the software page size), and,
     92  * on machines that exchange pages of input or output buffers with mbuf
     93  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     94  * of the hardware page size.
     95  */
     96 #ifndef MSIZE
     97 #ifdef _LP64
     98 #define	MSIZE		512		/* size of an mbuf */
     99 #else  /* _LP64 */
    100 #define	MSIZE		256		/* size of an mbuf */
    101 #endif /* _LP64 */
    102 #endif
    103 #ifndef MCLSHIFT
    104 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
    105 #endif
    106 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
    107 
    108 /*
    109  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    110  * logical pages.
    111  */
    112 #ifndef NKMEMPAGES_MIN_DEFAULT
    113 #define	NKMEMPAGES_MIN_DEFAULT	((16 * 1024 * 1024) >> PAGE_SHIFT)
    114 #endif
    115 #ifndef NKMEMPAGES_MAX_DEFAULT
    116 #define	NKMEMPAGES_MAX_DEFAULT	((256 * 1024 * 1024) >> PAGE_SHIFT)
    117 #endif
    118 
    119 #if defined(_KERNEL) && !defined(_LOCORE)
    120 #include <machine/cpu.h>
    121 #endif	/* _KERNEL && !_LOCORE */
    122 
    123 #endif /* _POWERPC_PARAM_H_ */
    124